---
id: CVE-2026-105867
title: Payload is a free and open source headless content management system
summary: >-
  Payload is a free and open source headless content management system. In
  @payloadcms/storage-s3 versions before 3.90.0 and canary versions before
  4.0.0-canary.34, an authenticated user can overwrite an existing S3 object
  belonging to ano…
severity: high
cvss: 7.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N'
cwe:
  - CWE-639
vendor: payloadcms
product: payload
affected:
  - payload < 3.90.0
  - 'payload >= 4.0.0-canary.0, < 4.0.0-canary.34'
  - storage-s3 < 3.90.0
  - 'storage-s3 >= 4.0.0-canary.0, < 4.0.0-canary.34'
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T18:16:50.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105867'
references:
  - url: >-
      https://github.com/payloadcms/payload/commit/2df8238fbf17edfce335c399b90bf524ba9906a2
    label: security-advisories@github.com
  - url: 'https://github.com/payloadcms/payload/releases/tag/v3.90.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/payloadcms/payload/security/advisories/GHSA-7vg8-29qx-jgj8
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-06T17:24:30.442506Z'
cvssSource: cna
ingestedAt: '2026-10-06T17:09:22.189Z'
---

## Overview

Payload is a free and open source headless content management system. In @payloadcms/storage-s3 versions before 3.90.0 and canary versions before 4.0.0-canary.34, an authenticated user can overwrite an existing S3 object belonging to another upload collection when client uploads are enabled for multiple collections sharing a bucket and useCompositePrefixes is false or unset. This bypasses the target collection's access controls and prior file validation. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.